Pressure-syringe and subcutaneous needle



J. A. E. SELLAR. PRESSURE SYRINGE AND SUSCUTANEOUS NEEDLE.

APPLICATION HLED IULY 23. I918.

Patented July 8, 1919 THE coLuuMa PLANOUHAPH c0, WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

JOHN A. E. SELLAR, OF EVERETT, MASSACHUSETTS, ASSIGNOR TO THE RANDALL-FAICHNEY COMPANY, INC., A CORPORATION OF MASSACHUSETTS.

PRES'SURE-SYRINGE AND SUIBCUTANEOUS NEEDLE.

Application filed July 23, 1918.

To all whom it may concern:

Be it known that 1, JOHN A. E. SELLAR, a citizen of the United States,residing at Everett, in the county of Middlesex and State ofMlassachusetts, have invented new and useful improvements in PressureSyringes and Subcutaneous Needles, Case 15,) of which the following is aspecification.

This invention relates to a pressure syringe and subcutaneous needle.

The object of the invention is to provide a pressure syringe andsubcutaneous needle combined and comprising a serum or fluid containerwhich will not leak, which will be absolutely sealed and which can berendered sterile and free from contamination, but which will be readilyadaptable for use by the application of direct pressure upon the pistonof the syringe without any danger or possibility of the fingers or ofany extraneous or contaminating material coming in contact with thesealing medium or the contents of the container.

The object of the invention is further to provide a device of thecharacter set forth which is entirely free from any possibility ofcorrosion or climatic or chemical changes.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims thereof.

The figure of the drawings is a sectional elevation of my improvedsyringe and needle.

In the drawing, 6 is the barrel of the syringe, preferably formed ofglass and provided with a piston 7 and piston rod 8. The barrel 6terminates at one end thereof in a neck 9, referably of less diameterthan that of the lEarrel 6 and having at its outer end an annular flange10. Said neck 9 is provided with a passage 11 which preferalbly taperstoward the outer end of said neck 9.

A sto per 13 fits the passage 11 and is forced t ereinto by a slightpressure. Said stopper is referably formed of cork or other material ofimpervious structure, but it may be made of glass or any other suitablematerial, and should be treated with a lubricating compound such asparaflin, glycerin or apy other lubricant capable of being steriliz Asubcutaneous needle 14 is provided with Specification of Letters Patent.

Patented July 8, 1919.

Serial No. 246,369.

a passage 15 extending longitudinally therethrough. Said needle 14extends art way through a duct 16 provided in a hu 17 and extendinglongitudinally of said hub.

The hub 17 is provided with annular flanges 18, 19 and 20 and is alsoprovided with a lateral passage 21 which extends into the duct 16adjacent to the flange 20. Said hub 17 is further provided with anextension 22 which extends beyond the lateral passage 21 and ispreferably cylindrical in cross section and taper from the cylindricalportion 22 into the flange 20. The extension 22 is of less diameter thanthe smallest diameter of the tapered passage 11, so that it may bepushed into said passage and eject the stopper 13 from the passage 11into the barrel 6. A flexible tubular member 23 connects the hub 17 tothe neck 9.

111 the operation of the device the barrel (3 is filled with serum orother fluid and sealed in the passage 11 of the neck 9 by the stopper13. The hub 17 with the needle 14- attached thereto is inserted in oneend of the flexible member The flexible memher is then ushed onto theneck 9 over the flange 10. he parts being thus assembled the stopper 13is ejected from the passage 11 of the neck 9 into the barrel 6 bypushing the extension 22 into the passage 11 and thus ejecting saidstopper. After the stopper has been ejected, the extension 22 iswithdrawn from the passage 11 of the neck 9 and the parts assume therelative positions illustrated in the drawing. The device is now readyto be used and by a slight pressure on the piston 7, while holding thesyringe in an upright position, the fluid in the barrel (3 passes out ofthe passage 11 of the neck 9 into the tubular member 23 and through thelateral passage 21 into the 1011- gitudinal duct 16 and from thenceflows through the passage 15 in the subcutaneous needle 14. Thephysician having by this means expelled any air that may have been undersuspension in the fluid or in the syringe inserts the needle 14 underthe cuticle of the patient and by pressure of the piston causes thefluid to flow freely from the needle.

The end of the hub 17 which is inclosed within the flexible member 23being tapered and preferably tapered on a concave curve renders it easyto insert the hub in the tubular member and also assists in the freeflow of the liquid from the tubular member into the lateral :passagevizland longitudinal duct 16.

Having thus described in i invention, what I claim and desire by LettersPatent to secure is:

l. A hypodermic syringe comprising a barrel, a neck at one end of saidbarrel having a passage extending therethroug'h, a stopper heldiin saidpassage by frictional contact With -said neck and a piston fitting intosaid barrel, in combination with a hy'po dermic needle a hub for saidhypodermic needle having a duet extending longitudinally thereof and apassage extending laterally of said hub into said longitudinal duct, anextension on said hub projecting longitudinally thereof beyond saidlateral passage and toward said n'eek, the diameter of said projectionbeing smaller than the smallest diameter of the passage in said neck,whereby said stopper may be ejected from said neck into said barrel, anda flexible tubular member connecting said neck and said hub.

2. A hypodermic syringe comprising a barrel, a neck at one end of saidbarrel having a passage extending therethrough and tapering toward theouter end of said neck, a stopper held in said passage by frictionalcontact withsaid neck and "a piston fitting into said barrel, incombination With a hypodermic needle a hub for said hypodermicneedlediaving a duct extending lonitudinally thereof and a passageextending ateirally of said hub into said longitudinal duct, anextension on said hub pro ecting longitudinally: thereof beyond saidlateral passage and toward said neck, the diameter oi: said prmjectionbeing smaller thanthe smallest diameter of the passage in said neck,whereby said stopper may be ejected from said neck into said iiarrel,and a flexible tubular member connecting said neck and said hub.

3. A hypodermic needle having a passage extending longitudinallytherethrough, a hub having a duct extending longitudinally thereof, intowhich duct the butt end of said hypodermic needle projects and fits,said hub having a lateral passage extending into said longitudinalpassage and anexten'sion on said hub projecting longitndin'all T thereofto a substantial extent beyond sai lateral passage.

4. A hypodermic needle having a passage extending longitudinallytheretlirough, "a hub having a duct extending longitudinally thereof,into which duct the butt end of said hypodermic needle projects andfits, said hub being provided With a lateral passage extending into saidlongitudinal duct, an annular flange on said hub, and an extension onsaid hub extending from said flange to a substantial extent beyond saidlateral passage, said extension being cylindrical throughout the greaterportion of its len th and tapering froin said flangeto said cyliindrical portion.

In testimony whereof I have hereunto set my hand in presence of twosubscribing \Vllnesses.

' JOHN A. E. SELLAIL Witnesses:

M. C. DURHAM, M. H. F onREsT.

Copies of this patent may be obtained for jive cents each, b addressingthe Commissioner of reams. Washington, 1). 0.

